Answer:
Option (B)
Explanation:
To measure the distance between two objects we use the units of length.
To measure small distances we use, mm or cm or m. But if we measure large distances between two objects we use large units such that kilometer or miles.
To measure the very large distances between two objects we use large units such as Astronomical unit or Parsec.
The Astronomical unit is defied as the distance between earth and Sun.
Thus, the distance between earth and the sun is defined as 1 Astronomical unit.
1 Astronomical unit = 1 A.U. = 1.5 x 10^8 km = 1.5 x 10^11 m
Answer:
The net force on the car is 2560 N.
Explanation:
According to work energy theorem, the amount of work done is equal to the change of kinetic energy by an object. If '
' be the work done on an object to change its kinetic energy from an initial value '
' to the final value '
', then mathematically,
![W = K_{f} - K_{i} = \dfrac{1}{2}~m~(v_{f}^{2} - v_{i}^{2})........................................(I)](https://tex.z-dn.net/?f=W%20%3D%20K_%7Bf%7D%20-%20K_%7Bi%7D%20%3D%20%5Cdfrac%7B1%7D%7B2%7D~m~%28v_%7Bf%7D%5E%7B2%7D%20-%20v_%7Bi%7D%5E%7B2%7D%29........................................%28I%29)
where '
' is the mass of the object and '
' and '
' be the initial and final velocity of the object respectively. If '
' be the net force applied on the car, as per given problem, and '
' is the displacement occurs then we can write,
![W = F_{net}~.~s.......................................................(II)](https://tex.z-dn.net/?f=W%20%3D%20F_%7Bnet%7D~.~s.......................................................%28II%29)
Given,
.
Equating equations (I) and (II),
![&& - F_{net} \times 35~m = \dfrac{1}{2} \times 1400~Kg~\times(14^{2} - 18^{2})~m^{2}~s^{-2}\\&or,& F_{net} = \dfrac{\dfrac{1}{2} \times 1400~Kg~\times(14^{2} - 18^{2})}{35}~N\\&or,& F_{net} = 2560~N](https://tex.z-dn.net/?f=%26%26%20-%20F_%7Bnet%7D%20%5Ctimes%2035~m%20%3D%20%5Cdfrac%7B1%7D%7B2%7D%20%5Ctimes%201400~Kg~%5Ctimes%2814%5E%7B2%7D%20-%2018%5E%7B2%7D%29~m%5E%7B2%7D~s%5E%7B-2%7D%5C%5C%26or%2C%26%20F_%7Bnet%7D%20%3D%20%5Cdfrac%7B%5Cdfrac%7B1%7D%7B2%7D%20%5Ctimes%201400~Kg~%5Ctimes%2814%5E%7B2%7D%20-%2018%5E%7B2%7D%29%7D%7B35%7D~N%5C%5C%26or%2C%26%20F_%7Bnet%7D%20%3D%202560~N)
Wave motion is the transfer of energy and momentum from one point of the medium to another point of the medium without actual transport of matter between two points.The dimensions in which a wave propagates energy, The energy transfer
Sodium weights 0.968 so the density is equal to 968